/* The Tunnel Cat — visual tokens per tunnel_cat/docs/TunnelCat_VisualStyle.md v1.0 */
:root {
  --tc-yellow-primary: #DC9518;
  --tc-yellow-light:   #DF9717;
  --tc-yellow-dark:    #BA7E1A;
  --tc-dark-primary:   #0D1720;
  --tc-black:          #070B0F;
  --tc-off-white:      #E6E1DA;
  --tc-metal-dark:     #333232;
  --tc-metal-mid:      #625C59;
  --tc-metal-light:    #9E948B;
  --tc-dust:           #CEA65A;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--tc-dark-primary);
  color: var(--tc-off-white);
  font-family: "IBM Plex Sans Condensed", "Arial Narrow", sans-serif;
  font-size: 18px;
  line-height: 1.55;
}

h1, h2, h3, .headline {
  font-family: "Oswald", "Arial Narrow", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  margin: 0;
}

a { color: inherit; text-decoration: none; }

.wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ── Header ─────────────────────────────────────────────────────── */
header.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  background: var(--tc-black);
  border-bottom: 3px solid var(--tc-yellow-primary);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-lockup img { height: 44px; width: 44px; border-radius: 50%; }
.brand-lockup .wordmark {
  font-family: "Oswald", sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.05;
  font-size: 20px;
  color: var(--tc-off-white);
}
.brand-lockup .wordmark span { display: block; color: var(--tc-yellow-primary); }

nav.main-nav { display: flex; gap: 28px; font-weight: 600; font-size: 16px; }
nav.main-nav a:hover { color: var(--tc-yellow-primary); }

.account-link {
  border: 1px solid var(--tc-yellow-primary);
  color: var(--tc-yellow-primary);
  padding: 8px 18px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 15px;
}

/* ── Hero ───────────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: flex-end;
  background-size: cover;
  background-position: center 30%;
  background-color: var(--tc-dark-primary);
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg,
    rgba(7,11,15,.25) 0%,
    rgba(7,11,15,.35) 40%,
    rgba(7,11,15,.85) 78%,
    rgba(7,11,15,.98) 100%);
}
.hero { border-bottom: 6px solid var(--tc-yellow-primary); }
.hero .hero-inner { position: relative; z-index: 2; }

.hero-inner { padding: 64px 0 56px; width: 100%; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--tc-yellow-primary);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .08em;
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1.05;
  max-width: 820px;
  color: var(--tc-off-white);
}
.hero h1 .accent { color: var(--tc-yellow-primary); }
.hero p.lede {
  max-width: 620px;
  margin-top: 20px;
  font-size: 19px;
  color: var(--tc-off-white);
  opacity: .92;
}

.hero-actions { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: .02em;
  border: 2px solid transparent;
  cursor: pointer;
}
.btn-primary { background: var(--tc-yellow-primary); color: var(--tc-black); }
.btn-primary:hover { background: var(--tc-yellow-light); }
.btn-secondary { border-color: var(--tc-metal-light); color: var(--tc-off-white); background: transparent; }
.btn-secondary:hover { border-color: var(--tc-yellow-primary); color: var(--tc-yellow-primary); }

/* ── Diagonal tagline band ─────────────────────────────────────── */
.tagline-band {
  background: var(--tc-yellow-primary);
  color: var(--tc-black);
  transform: skewY(-1.4deg);
  margin: -18px 0 40px;
  padding: 18px 0;
}
.tagline-band .wrap { transform: skewY(1.4deg); }
.tagline-band p {
  font-family: "Oswald", sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 22px;
  text-align: center;
  margin: 0;
}

/* ── Feature strip ──────────────────────────────────────────────── */
.feature-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--tc-metal-dark);
  border: 1px solid var(--tc-metal-dark);
  margin-bottom: 56px;
}
.feature-strip .feature {
  background: var(--tc-black);
  padding: 22px 20px;
}
.feature-strip .feature-icon {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 12px;
}
.feature-strip .feature-icon img { width: 100%; height: 100%; object-fit: contain; }
.feature-strip h3 {
  font-size: 16px;
  color: var(--tc-off-white);
  margin-bottom: 6px;
}
.feature-strip p { font-size: 14px; color: var(--tc-metal-light); margin: 0; }

/* ── Infrastructure / Heroes cards ─────────────────────────────── */
.section-label {
  color: var(--tc-yellow-primary);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.card-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 56px; }
.card {
  border: 1px solid var(--tc-metal-dark);
  background: var(--tc-black);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.card h3 { font-size: 16px; color: var(--tc-off-white); margin-bottom: 4px; }
.card p { font-size: 14px; color: var(--tc-metal-light); margin: 0; }
.card .arrow { color: var(--tc-yellow-primary); font-size: 20px; }

.hero-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-bottom: 64px; }
.hero-card {
  border: 1px solid var(--tc-metal-dark);
  background: var(--tc-black);
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.hero-card img {
  width: 64px; height: 64px; border-radius: 50%;
  border: 2px solid var(--tc-yellow-primary);
  object-fit: cover;
}
.hero-card h3 { font-size: 16px; margin-bottom: 4px; }
.hero-card p { font-size: 14px; color: var(--tc-metal-light); margin: 0; }

/* ── SDK callout ────────────────────────────────────────────────── */
.sdk-callout {
  border: 2px solid var(--tc-yellow-primary);
  background: var(--tc-black);
  padding: 32px;
  margin-bottom: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.sdk-callout h2 { font-size: 26px; margin-bottom: 8px; }
.sdk-callout p { color: var(--tc-metal-light); margin: 0; max-width: 520px; }

/* ── Lang switch ────────────────────────────────────────────────── */
.lang-switch { display: flex; gap: 4px; margin-right: 14px; }
.lang-switch button {
  background: transparent;
  border: 1px solid var(--tc-metal-dark);
  color: var(--tc-metal-light);
  font-size: 12px;
  font-weight: 700;
  padding: 5px 9px;
  border-radius: 3px;
  cursor: pointer;
}
.lang-switch button.active { border-color: var(--tc-yellow-primary); color: var(--tc-yellow-primary); }
.header-right { display: flex; align-items: center; }

/* ── Problem section ────────────────────────────────────────────── */
.section { padding: 64px 0; border-top: 1px solid var(--tc-metal-dark); }
.section-tag {
  color: var(--tc-yellow-primary);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section h2 { font-size: clamp(26px, 3.4vw, 38px); color: var(--tc-off-white); margin-bottom: 14px; }
.section .lede { max-width: 640px; color: var(--tc-metal-light); font-size: 16px; }

.problem-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 32px;
  border: 1px solid var(--tc-metal-dark);
}
.problem-card { background: var(--tc-black); padding: 22px 18px; border-right: 1px solid var(--tc-metal-dark); }
.problem-card:last-child { background: rgba(220,149,24,.06); border-right: none; }
.problem-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 3px;
  margin-bottom: 10px;
  letter-spacing: .05em;
  text-transform: uppercase;
}
.badge-blocked { background: rgba(239,68,68,.12); border: 1px solid rgba(239,68,68,.35); color: #EF6B4D; }
.badge-ok { background: rgba(220,149,24,.14); border: 1px solid var(--tc-yellow-primary); color: var(--tc-yellow-primary); }
.problem-name { font-family: "Oswald", sans-serif; font-size: 16px; font-weight: 700; color: var(--tc-off-white); margin-bottom: 8px; text-transform: uppercase; }
.problem-desc { font-size: 13.5px; line-height: 1.6; color: var(--tc-metal-light); }

/* ── Architecture legend ────────────────────────────────────────── */
.arch-diagram {
  margin-top: 28px;
  border: 1px solid var(--tc-metal-dark);
  background: var(--tc-black);
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}
.arch-node {
  flex: 1;
  min-width: 120px;
  text-align: center;
  padding: 16px 10px;
  border: 1px solid var(--tc-metal-dark);
  font-weight: 700;
  font-family: "Oswald", sans-serif;
  text-transform: uppercase;
  letter-spacing: .04em;
  font-size: 14px;
  color: var(--tc-off-white);
}
.arch-node.tc-highlight { border-color: var(--tc-yellow-primary); color: var(--tc-yellow-primary); }
.arch-arrow { color: var(--tc-yellow-primary); font-size: 22px; }

/* ── Layers grid ────────────────────────────────────────────────── */
.layers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  margin-top: 32px;
}
.layer-card {
  background: var(--tc-black);
  border: 1px solid var(--tc-metal-dark);
  padding: 20px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.layer-num {
  flex-shrink: 0;
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--tc-yellow-primary);
  display: flex; align-items: center; justify-content: center;
  font-family: "IBM Plex Mono", monospace;
  font-weight: 700;
  font-size: 13px;
  color: var(--tc-yellow-primary);
}
.layer-body h3 { font-size: 15px; color: var(--tc-off-white); margin-bottom: 6px; font-family: "Oswald", sans-serif; text-transform: none; }
.layer-body p { font-size: 13px; line-height: 1.6; color: var(--tc-metal-light); margin: 0; }

/* ── Comparison table ───────────────────────────────────────────── */
.compare-wrap { overflow-x: auto; margin-top: 32px; border: 1px solid var(--tc-metal-dark); }
.compare-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.compare-table th {
  padding: 12px 14px; text-align: center; font-size: 11px; font-weight: 700;
  letter-spacing: .05em; text-transform: uppercase; color: var(--tc-metal-light);
  border-bottom: 1px solid var(--tc-metal-dark); background: var(--tc-black); white-space: nowrap;
}
.compare-table th.th-tc { color: var(--tc-yellow-primary); background: rgba(220,149,24,.08); }
.compare-table td { padding: 11px 14px; text-align: center; border-bottom: 1px solid var(--tc-metal-dark); }
.compare-table td.td-label { text-align: left; color: var(--tc-off-white); font-weight: 500; }
.compare-table td.td-tc { background: rgba(220,149,24,.05); }
.compare-table tr:last-child td { border-bottom: none; }
.ic-yes { font-weight: 700; color: var(--tc-yellow-primary); font-size: 12px; }
.ic-no { font-weight: 700; color: #EF6B4D; font-size: 12px; }
.ic-part { font-weight: 700; color: var(--tc-dust); font-size: 12px; }

/* ── Cross-promo banners (SNC / Apps entry points) ─────────────── */
.cross-promo-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 8px 0 56px; }
.cross-promo {
  display: block; border-radius: 12px; padding: 30px; min-height: 160px;
  border: 2px solid var(--tc-metal-dark);
  background: var(--tc-black);
  transition: border-color .15s, transform .15s;
}
.cross-promo:hover { transform: translateY(-2px); }
.cross-promo .eyebrow3 { font-family: "IBM Plex Mono", monospace; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 10px; }
.cross-promo h3 { font-family: "Oswald", sans-serif; font-size: 22px; margin: 0 0 8px; }
.cross-promo p { color: var(--tc-metal-light); font-size: 14px; margin: 0 0 14px; }
.cross-promo .go { font-weight: 700; font-size: 14px; }
.cross-promo.snc { border-color: #59C8FF44; }
.cross-promo.snc:hover { border-color: #59C8FF; }
.cross-promo.snc .eyebrow3, .cross-promo.snc .go { color: #59C8FF; }
.cross-promo.apps { border-color: #8B7CFF44; }
.cross-promo.apps:hover { border-color: #8B7CFF; }
.cross-promo.apps .eyebrow3, .cross-promo.apps .go { color: #8B7CFF; }

footer.site-footer {
  border-top: 3px solid var(--tc-yellow-primary);
  background: var(--tc-black);
  padding: 28px 0;
  color: var(--tc-metal-light);
  font-size: 13px;
  text-align: center;
}
.brand-lockup-link { text-decoration: none; color: inherit; display: flex; align-items: center; }

/* ── Mobile menu (hamburger) ────────────────────────────────────── */
.mobile-menu-btn {
  display: none; width: 40px; height: 40px; border-radius: 8px; flex-shrink: 0;
  border: 1px solid var(--tc-metal-dark); background: transparent; cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 4px;
}
.mobile-menu-btn span { display: block; width: 18px; height: 2px; background: var(--tc-off-white); border-radius: 1px; transition: transform .2s, opacity .2s; }
.mobile-menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.mobile-menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.mobile-menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
@media (max-width: 900px) {
  header.site-header { position: relative; flex-wrap: wrap; gap: 10px; padding: 14px 20px; }
  .mobile-menu-btn { display: flex; }
  nav.main-nav, .header-right { display: none; }
  header.site-header.mobile-nav-open nav.main-nav,
  header.site-header.mobile-nav-open .header-right {
    display: flex; flex-direction: column; align-items: stretch; gap: 4px;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--tc-black); border-top: 1px solid var(--tc-metal-dark);
    padding: 16px 20px; z-index: 60;
  }
  header.site-header.mobile-nav-open nav.main-nav { border-bottom: 1px solid var(--tc-metal-dark); padding-bottom: 16px; }
  header.site-header.mobile-nav-open nav.main-nav a,
  header.site-header.mobile-nav-open .header-right a,
  header.site-header.mobile-nav-open .header-right button {
    padding: 10px 0; width: 100%; text-align: left;
  }
  header.site-header.mobile-nav-open .header-right { gap: 10px; }
}